In regards to question #2, I installed a spoiler on my 2013 SXT. No back-up camera, but the bumper did have back -up sensors. Anyway, the spoiler came with a template to lay out on your trunk, so you would know where to drill the holes. I think it was 5 plastic push pins in the middle, and two bolts on the outer ends. I no longer have this car, but the installation went well for me. I just wish I could remember where I bought the spoiler from to help you out.